James Yeager -- CEO of Tactical Response, a Tennessee-based company that specializes in firearms and tactical training -- said the White House could spark a civil war if it issues an executive order on gun control. And Yeager said he would be "glad to fire the first shot."

"I'm not fucking putting up with this," he said in a video message posted Wednesday. "I am not letting my country be ruled by a dictator. I'm not letting anybody take my guns. If it goes one inch further, I'm gonna start killing people."